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Interlock Industries
Interlock Industries, Inc. was founded in 1982 when four businessmen joined forces in the ownership of an international manufacturer of custom roofing and...
Interlock Industries
Interlock Industries, Inc. was founded in 1982 when four businessmen joined forces in the ownership of an international manufacturer of custom roofing and siding products. Their mission: diversification through the acquisition of strong, growth-oriented companies. Within three years, holdings included transportation, aluminum billet casting and extrusion, and corrugated packaging companies.
General information
Firm type
Single Family Office
Year founded
1982
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Louisville
Corporate office
545 South 3rd Street, Suite 310, Louisville, KY 40202, United States
Additional offices
Saskatoon, SK, Canada · Sellersburg, IN, United States · Stanwood, WA, United States
Principals
Jeffrey L. Mackin
President and Director
Craig Mackin
Chief Financial Officer
Sector focus
Frequently asked questions
What is the source of Interlock Industries' capital?
The Mackin family's wealth derives primarily from two long-standing industrial businesses: Metal Sales Manufacturing Corporation, a major privately held producer of metal roofing, siding and building components with a nationwide footprint, and Ohio Valley Aluminum Co., a regional aluminum extruder and processor. Interlock Industries functions as the family's holding and reinvestment entity for the proceeds generated by these operating companies.
How does Interlock Industries invest its capital?
The firm pursues mezzanine lending and private credit as its primary investment strategy, providing subordinated debt with equity-linked features to middle-market companies. This is complemented by a directly owned portfolio of commercial and industrial real estate in Kentucky, Indiana, Washington and Saskatchewan. A notable ancillary strategy is thoroughbred racing and breeding, conducted through M 5 Stable in partnership with Magdalena Racing.
Who runs investment decisions at Interlock Industries?
Jeffrey L. Mackin, President and Director of Interlock Industries, and Craig Mackin, its Chief Financial Officer, jointly direct the firm. Craig Mackin also serves as CEO of Metal Sales Manufacturing Corporation, creating a direct link between the core operating business and the family's investment office that eliminates reliance on external fund managers for capital allocation decisions.
Does Interlock Industries take outside capital from other families or institutions?
No. The firm operates as a single-family office and does not accept outside capital or market investment products to third parties. All commitments — from mezzanine loans to real estate acquisitions — are funded directly from the Mackin family's own balance sheet, sourced from retained earnings of their operating companies.
What role does thoroughbred racing play in the portfolio?
Through M 5 Stable, co-invested with trainer Kenneth McPeek's Magdalena Racing, the Mackin family participates in the thoroughbred racing and breeding industry. This is a deliberate, longstanding allocation treated as a repeatable co-investment model rather than a passive hobby, giving the family exposure to a niche, hard-asset-adjacent entertainment sector with tax-advantaged depreciation and breeding-upside characteristics.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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